Circular loom



Dec. 7, 1937. w POOL 2,101,283

C IRCULAR LOOM Filed March 17, 1957 WILLIAM POOL //v VEN 70,0

ATTORNEYJ Patented Dec. 7, 1937 UNITED STATES ime PATENT OFFlCE signor to Celanese Corporation of America, a corporation of Delaware Application March 17,

1937, Serial No. 131,343

In Great Britain April '7, 1936 9 Claims.

This invention relates to improvements in circular looms, having particular reference tothe detection of shedding faults in such looms. If, by any reason, a number of threads of one warp sheet fail to pass to the appropriate side of the shuttle, a weft float results which, if undetected, causes faulty fabric to be woven.

According to the present invention faulty shedding is detected by means of a detector finger carried by the shuttle and urged by suitable means into contact with a warp sheet. When, by reason of faulty shedding, a number of warp threads are missing from that sheet, the finger moves under the action of the urging means to impel a member controlled by the finger into contact with the threads of the other warp sheet. The relative circular motion existing between the shuttle and the warp threads with respect to the loom axis causes the other warp sheet to move the said member towards the rear of the shuttle, and this rearward motion is utilized to actuate a stop mechanism.

Conveniently the stop mechanism may be of the type in which a warp jam detector, movably mounted on the shuttle, is adapted to be projected through one warp sheet to actuate outside the warp shed a switch or other element controlling the relative circular motion between the warp shed and the shuttle.

Conveniently, the detector finger is directly mounted on the jam detector, which may for example, consist of a rod connected to or carrying a feeler at the front of the shuttle adapted to detect jammed warps. or the finger may be carried on the feeler itself. The detection of a. sheddin fault thus causes the finger and the movable rod to move rearwardly to actuate the stop mechanism, this arrangement enabling a single stop mechanism to bring weaving to an end when either jams or floats occur.

In order to detect faulty shedding in either warp sheet, the detector finger may be duplicated, each member being urged by suitable means towards its appropriate sheet. Conveniently a spring is used to urge a finger towards the one warp sheet, the strength of the spring being such that so long as the warp sheet felt by the finger remains intact, the contact between the warps in that sheet and the finger overcomes the urge of the spring. Each finger may have its own spring, or a single spring may be used connecting the two fingers in such a manner as to cause them to spread into contact with the two warp sheets.

A particular form of the detector mechanism according to the invention will now be described in greater detail with reference to the accompanying drawing in connection with a shuttle provided with a. jam detector of the type described in U. S. application S. No. 629,9l3,-filed August 1932.

In. the drawing Fig. 1 is a side elevation of a shuttle provided with a detector mechanism;

Fig. 2 is a diagrammatic plan view of Fig. 1 showing the detector mechanism in the position occupied during normal shedding;

Fig. 3 is a diagrammatic plan view of Fig. 1 showing the detector mechanism in the position. it assumes when there is faulty shedding; and

Fig. 4 is a part plan view of l on an enlarged scale.

Referring to Figs. 1, 3, and 4, a shuttle l is provided with a jam detector 2 supported in the shuttle by two wings 3 and 4 connected to an up right member 5. The member 5 is attached to a rod 6 slidably supported in bearings l and 8. A. link 9 is pivotally attached at its lower extremity to the rod 5, and is also pivotally attached at its upper extremity to a member in which is slotted to give free movement to the member 5. Attached to the member 5 is a spring H which is hooked round the link 9 for the purpose of urging the jam detector 2 forwardly away from the front of theshuttle. At the top of the jam detector 2 is provided a. plate I2 pointing forwardly of the shuttle to pass smoothly between the sheets l3 and 14 into which the warps have been divided by the shedding wheel l5.

The plate 12 is provided with a vertical pivot 56 for two detector fingers I! and i8, disposed one above and. the other below the plate i2. Each finger extends rearwardly of the pivot l5 and terminates in a curved portion 59 adapted to slide along the inside of a warp sheet. Anj arm 25? connected to the finger I8 is connected by a spring 2! to a post 22 secured to the plate I2 forwardly of the pivot I6, the spring 2! urging the finger i8 into contact with the warp sheet I3. Each finger extends forwardly of the pivot it to provide a member 23 normally lying within the bounds of the plate l2, and with its end 24 just clear of the corresponding warp sheet I3 or M.

When a gap in either warp sheet occurs, as shown in Fig. 3, the rearwardly extending portion l9 of the corresponding finger H or H.- contacting with that sheet passes through the gap 5 the pull of the spring 2|, and the forwardly extending portion 24 is swung about the pivot 25 so as to passthrough the threads of the other warp sheet and be pulled rearwardly of the shuttle by the pressure of the warp threads. The pressure on the finger is transmitted through the pivot It to the plate I2 so that the plate and the Whole of the jam detector 2 to which it is secured is carried rearwardly of the shuttle. The rod 6 is carried through the warp sheet 3 to engage the arm 26 of a switch 21, thus separating a pair of contacts 28 which control the driving mechanism of the loom. The switch 21 may conveniently be of the type described in U. S. application S. No. 98,274, filed 28th August 1936.

The invention may be applied to looms in which the shuttles rotate about the loom axis, with the warps held stationary, or looms in which the warps rotate with the shuttles either held stationary or rotating in the opposite direction.

Having described my invention what I desire to secure by Letters Patent is:-

1. A circular loom shuttle comprising adetector finger carried by the shuttle, means to urge said finger into contact with one sheet of a warp shed in which the shuttle lies, so as to detect warp threads missing from that sheet, a stop mechanism actuating member and a member adapted to be moved by said finger upon such detection into contact with the other sheet of the warp shed and by such contact to be moved towards the rear of the shuttle to operate said stop mechanism actuating member.

2. A circular loom shuttle comprising a detector finger carried by the shuttle, means to urge said finger into contact with one sheet of a warp shed in which the shuttle lies, so as to detect warp threads missing from that sheet, a stop mechanism actuating member movably mounted on the shuttle, and a member mounted on said actuating member and adapted to be moved by said finger upon such detection into contact with the other sheet of the warp shed and by such contact to be moved towards the rear of the shuttle to operate said stop mechanism actuating member.

3. A circular loom shuttle comprising a detector finger pivotally mounted on the shuttle, said finger projecting forwardly and rearwardly of its pivot, means to urge the rearward part of said finger into contact with one sheet of a warp shed in which the shuttle lies, so as to detect warp threads missing from that sheet, and a stop mechanism actuating member, the forward part of said finger being adapted to be moved by said rearward part upon such detection into contact with the other sheet of the warp shed and by such contact to be moved towards the rear of the shuttle to operate said stop mechanism actuating member. 4

4. A circular loom shuttle comprising a stop mechanism actuating member movably mounted on the shuttle, a detector finger pivotally mounted on said actuating member, said finger projecting forwardly and rearwardly of its pivot and means to urge the rearward part of said finger into contact with one sheet of a warp shed in which the shuttle lies, so as to detect warp threads missing from that sheet, the forward part of said finger being adapted to be moved by said rearward part upon such detection into contact with the other sheet of the warp shed and by such contact to be moved towards the rear of the shuttle to operate said stop mechanism actuating member.

5. A circular loom shuttle comprising a detector finger carried by the shuttle, means to urge said finger into contact with one sheet of a warp shed in which the shuttle lies, so as to detect warp threads missing from that sheet, a warp jam detector, a stop mechanism actuating rod controlled by said jam detector and a member adapted to be moved by said finger upon such detection into contact with the other sheet of the warp shed and by such contact to be moved towards the rear of the shuttle to operate said stop mechanism actuating rod.

6. A circular loom shuttle comprising a detector finger carried by the shuttle, means to urge said finger into contact with one sheet of a warp shed in which the shuttle lies, so as to detect warp threads missing from that sheet, a warp jam detector movably mounted on the shuttle, a stop mechanism actuating rod controlled by said jam detector and a member mounted on said jam detector and adapted to be moved by said finger upon such detection into contact with the other sheet of the warp shed and by such contact to be moved towards the rear of the shuttle to operate said stop mechanism actuating rod.

7. A circular loom shuttle comprising a warp jam detector movably mounted on the shuttle, a detector finger pivotally mounted on said jam detector, said finger projecting forwardly and rearwardly of its pivot, means to urge the rearward part of said finger into contact with one sheet of a warp shed in which the shuttle lies, so as to detect warp threads missing from that sheet and a stop mechanism actuating member, the forward part of said finger being adapted to be moved by said rearward part upon such detection into contact with the other sheet of the warp shed and by such contact to be moved towards the rear of the shuttle to operate said stop mechanism actuating member.

8. A circular loom shuttle comprising a detector finger carried by the shuttle, spring means to urge said finger into contact with one sheet of a warp shed in which the shuttle lies, so as to detect warp threads missing from that sheet, a stop mechanism actuating member and a member adapted to be moved by said finger upon such detection into contact with the other sheet of the warp shed and by such contact to be moved towards the rear of the shuttle to operate said stop mechanism actuating member.

9. A circular loom shuttle comprising a warp jam detector movably mounted on the shuttle, a pair of detector fingers pivotally mounted on said jam detector, one for each sheet of a warp shed in which the shuttle lies, each finger projecting forwardly and rearwardly of its pivot, spring means to'urge the rearward part of each of said fingers into contact with its warp sheet so as to detect warp threads missing therefrom and a stop mechanism actuating member, the forward part of each of said fingers being adapted to be moved by said rearward part upon such detection into contact with the other sheet of the warp shed and by such contact to be moved towards the rear of the shuttle to operate said stop mechanism actuating member.

WILLIAM POOL. 

